Imagine this...
You went out for a walk this morning when you were met by Lucifer. You tried to fight him off but didn't have the proper weapon. You were later found dead by Sam and Dean. When Jack found out who killed you he wasn't happy.
"Did you kill her?" Jack asks his father
"Listen, Jack-" Lucifer tries to explain
"DID YOU KILL HER?!" He raises his voice
"Yes, I did. But she only would have gotten in the way of us, Jack."
"You're not my father. You're a monster"
Afterward, they fought it out and Jack ended up winning. Since he was still young he didn't know how to bring you back. Until one day they get a knock on their door.